The invention provides a method for recycling arsenic-containing ciliate desert-grass. The method comprises the following steps ofcollecting anoverground part of ciliate desert-grass in the mature period, and carrying out cleaning, drying, crushing and sieving to obtain a sample; placing ciliate desert-grass powder in a tubular furnace quartz tube; sweeping a hearth with carrier gas (N2) to removeair in the tubular furnace quartz tube; starting to warm up after 5 min, and keeping the constant temperature for a period of time after the temperature reaches a set temperature to ensure that the sample is fully heated; and stopping heating, and taking out the sample after the hearth is cooled to room temperature. According to the method, a large amount of arsenic-containing ciliate desert-grass can be effectively treated, crude arsenic can be prepared with convenient operation atlow reduction temperature, the method is clean and environmentally friendly, and resource reuse is achieved.